Journal cover Journal topic
Annales Geophysicae An interactive open-access journal of the European Geosciences Union
Journal topic

Journal metrics

IF value: 1.490
IF1.490
IF 5-year value: 1.445
IF 5-year
1.445
CiteScore value: 2.9
CiteScore
2.9
SNIP value: 0.789
SNIP0.789
IPP value: 1.48
IPP1.48
SJR value: 0.74
SJR0.74
Scimago H <br class='widget-line-break'>index value: 88
Scimago H
index
88
h5-index value: 21
h5-index21
Preprints
https://doi.org/10.5194/angeo-2020-71
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-2020-71
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

  23 Oct 2020

23 Oct 2020

Review status
This preprint is currently under review for the journal ANGEO.

Modelling the residual mean meridional circulation at different stages of stratospheric warming events

Andrey V. Koval1,2, Anna N. Bakhareva1, Ksenia A. Didenko1,2, Tatiana S. Ermakova1,2, Nikolai M. Gavrilov1, Alexander I. Pogoreltsev1,2, Olga N. Toptunova1,2, and Anton S. Zarubin1 Andrey V. Koval et al.
  • 1Atmospheric Physics Department, Saint-Petersburg State University, Saint-Petersburg, 198504, Russia
  • 2Department of Meteorological Forecasts, Russian State Hydrometeorological University, Saint-Petersburg, Russia

Abstract. Ensemble simulation of the general atmospheric circulation of the middle and upper atmosphere up to the lower thermosphere is performed using the 3-D nonlinear mechanistic numerical model MUAM. Residual mean meridional circulation (RMC) in terms of the Transformed Eulerian Mean is calculated for the boreal winter and changes in its vertical and meridional velocity components during different phases of simulated composite stratospheric warming (SW) events are studied. The simulation results show general decrease in RMC velocity components up to 30 % during and after SW in the mesosphere and lower thermosphere of the Northern Hemisphere. There are also increases in the downward and northward velocities at altitudes 50–70 km at the northern high latitudes. Associated changes in adiabatic heating/cooling rates can contribute to heating the stratosphere and cooling the mesosphere during the composite SW. The changes in the transport of conservative species (like ozone) during SWs are estimated. Weakening of ozone fluxes at the middle latitudes of the Northern Hemisphere may reach 30 % during SWs and 30–40 % after the events at the altitudes of stratospheric maximum of ozone concentration. Such statistically confident simulations of RMC reactions on SWs at altitudes up to the lower thermosphere are performed for the first time. The study of the residual meridional circulation is useful for effective analysis of wave impacts on the mean flow and for diagnostics of the transport of atmospheric gas species in the atmosphere.

Andrey V. Koval et al.

Interactive discussion

Status: open (until 04 Dec 2020)
Status: open (until 04 Dec 2020)
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
[Subscribe to comment alert] Printer-friendly Version - Printer-friendly version Supplement - Supplement

Andrey V. Koval et al.

Andrey V. Koval et al.

Viewed

Total article views: 202 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
180 21 1 202 0 1
  • HTML: 180
  • PDF: 21
  • XML: 1
  • Total: 202
  • BibTeX: 0
  • EndNote: 1
Views and downloads (calculated since 23 Oct 2020)
Cumulative views and downloads (calculated since 23 Oct 2020)

Viewed (geographical distribution)

Total article views: 198 (including HTML, PDF, and XML) Thereof 196 with geography defined and 2 with unknown origin.
Country # Views %
  • 1
1
 
 
 
 

Cited

Saved

No saved metrics found.

Discussed

No discussed metrics found.
Latest update: 23 Nov 2020
Publications Copernicus
Download
Short summary
Numerical modeling is used to simulate atmospheric circulation and calculate residual mean meridional circulation (RMC) during sudden stratospheric warming event (SSW). Calculating the RMC is used to take into account wave effects on transport of atmospheric quantities and gas species in the meridional plane. The results show that RMC undergoes significant changes at different stages of SSW and also contribute to the SSW development.
Numerical modeling is used to simulate atmospheric circulation and calculate residual mean...
Citation